Air outlet barrel capable of reducing noise based on fan operation

Abstract

The utility model relates to the technical field of ventilation and noise reduction, and discloses an air outlet barrel capable of reducing noise based on fan operation, which comprises a connecting air pipe, an air pipe expansion section is fixedly connected to one side of the connecting air pipe, and a silencing barrel is fixedly connected to one side, far away from the connecting air pipe, of the air pipe expansion section. The side, away from the air pipe expansion section, of the air buffering cover is fixedly connected with the air buffering cover, the end, away from the silencing barrel, of the air buffering cover is fixedly connected with an air outlet buffering pipe, the upper surface of the air outlet buffering pipe is fixedly connected with an air outlet pipeline, and the lower end of the side face of the connecting air pipe and the lower end of the side face of the silencing barrel are both fixedly connected with a fixing frame. According to the air outlet barrel, noise generated by operation of the fan is effectively reduced, the mining area and the surrounding environment are remarkably improved, the living and working quality of residents is improved, the operation mode and ventilation conditions of the fan do not need to be changed, the cost is lower, implementation is easier and more convenient, and remarkable economic benefits and practicability are achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of ventilation noise reduction, in particular to an air outlet duct capable of reducing noise based on the operation of a fan. Background Art

[0002] In the mining production process, fans, as key ventilation equipment, play a vital role in ensuring underground air circulation and removing harmful gases. The noise pollution problem generated by fans during operation has become increasingly prominent, not only affecting the production environment of the mining area, but also causing serious interference to the daily life and work of surrounding residents. Therefore, how to effectively reduce the noise generated by fan operation without changing the fan operation and underground ventilation conditions has become an urgent problem to be solved in current mining production.

[0003] Traditional noise reduction methods are often achieved by adding sound insulation facilities or adjusting the fan speed, which is not only costly but also affects the normal operation and ventilation effect of the fan. For this reason, we propose an air outlet duct that can reduce noise based on fan operation. Utility Model Content

[0004] 1. Technical issues to be resolved

[0005] In view of the deficiencies in the prior art, the utility model provides an air outlet duct capable of reducing noise based on the operation of a fan, thereby solving the above-mentioned problems.

[0006] (II) Technical solution

[0007] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an air outlet duct capable of reducing noise based on the operation of a fan, comprising a connecting air duct, a duct expansion section is fixedly connected to one side of the connecting air duct, a muffler is fixedly connected to the side of the duct expansion section away from the connecting air duct, a slow wind cover is fixedly connected to the side of the muffler away from the duct expansion section, an air outlet buffer pipe is fixedly connected to one end of the slow wind cover away from the muffler, an air outlet duct is fixedly connected to the upper surface of the air outlet buffer pipe, and the lower ends of the side surfaces of the connecting air duct and the muffler are fixedly connected to a European fixing frame, and also includes:

[0008] A noise reduction device is arranged in the inner cavity of the air duct expansion section, and is used for slowing down and reducing the noise of the passing airflow. The noise reduction device includes a rotating rod, a silencer roller and an arc-shaped air receiving plate. The upper and lower ends of the inner wall of the air duct expansion section are rotatably connected with the rotating rod, and the silencer roller is fixedly connected to the rotating rod. A plurality of arc-shaped air receiving plates arranged equidistantly in a ring are fixedly connected to the side of the silencer roller. The arc-shaped air receiving plate is arc-shaped, and a sound insulation plate is fixedly connected to the curved inner side of the arc-shaped air receiving plate.

[0009] Preferably, a shock-absorbing flange gasket is fixedly connected to a side of the connecting air duct away from the air duct expansion section.

[0010] Preferably, both ends of the air duct expansion section are funnel-shaped, expanding from the two ends toward the middle.

[0011] Preferably, a layer of sound insulation material is provided on the inner wall of the silencer.

[0012] Preferably, the bottom surface of the air outlet buffer tube is arc-shaped at one end away from the wind buffer cover, a vent is provided on the upper surface of the air outlet buffer tube, an integrated wind direction guide block is fixedly connected to one end of the top inner wall of the air outlet buffer tube close to the vent, and a plurality of equidistantly arranged wind guide plates are fixedly connected between the side of the wind direction guide block close to the vent and the inner wall of the air outlet buffer tube.

[0013] (III) Beneficial effects

[0014] Compared with the prior art, the utility model provides an air outlet duct capable of reducing noise based on the operation of a fan, which has the following beneficial effects:

[0015] 1. This noise-reducing air outlet based on fan operation effectively weakens the noise generated during the operation of the fan by optimizing the structure, greatly reducing the degree of noise pollution to the surrounding environment, which not only improves the overall working environment quality of the mining area, but also greatly reduces the degree of noise interference to the surrounding residents and improves their living and working conditions.

[0016] 2. This air outlet duct that can reduce noise based on fan operation does not change the operation mode of the fan and the underground ventilation conditions. Compared with traditional noise reduction methods, the noise-reducing air outlet duct based on fan operation has the advantages of lower cost and easier implementation, and does not require large-scale modifications to existing fans and ventilation systems. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the structure of the utility model;

[0018] Figure 2 This is a cross-sectional schematic diagram of the expansion section of the air duct of the utility model;

[0019] Figure 3 This is a cross-sectional schematic diagram of the air outlet buffer tube of the utility model;

[0020] Figure 4 This is a schematic diagram of the internal structure of the air outlet duct of the utility model;

[0021] Figure 5 for Figure 2 A local enlarged schematic diagram of point A in the figure.

[0022] In the figure: 1. Connecting air duct; 2. Air duct expansion section; 3. Silencer; 4. Wind damping hood; 5. Air outlet buffer pipe; 6. Air outlet duct; 7. Noise reduction device; 8. Wind direction guide block; 9. Air guide plate; 10. Fixing frame; 11. Filter screen; 12. Shock-absorbing flange gasket; 13. Rotating rod; 14. Silence roller; 15. Arc-shaped air receiving plate; 16. Sound insulation board. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0024] See also Figure 1-5 , an air outlet duct capable of reducing noise based on fan operation, comprising a connecting air duct 1, a duct expansion section 2 is fixedly connected to one side of the connecting air duct 1, a muffler 3 is fixedly connected to the side of the duct expansion section 2 away from the connecting air duct 1, a slow wind cover 4 is fixedly connected to the side of the muffler 3 away from the duct expansion section 2, an end of the slow wind cover 4 away from the muffler 3 is fixedly connected to an air outlet buffer pipe 5, an air outlet duct 6 is fixedly connected to the upper surface of the air outlet buffer pipe 5, and a European fixing frame 10 is fixedly connected to the lower ends of the side surfaces of the connecting air duct 1 and the muffler 3, and also includes:

[0025] The noise reduction device 7 is arranged in the inner cavity of the air duct expansion section 2. The noise reduction device 7 includes a rotating rod 13, a silencer roller 14 and an arc-shaped air receiving plate 15. The upper and lower ends of the inner wall of the air duct expansion section 2 are rotatably connected with the rotating rod 13, and the silencer roller 14 is fixedly connected to the rotating rod 13. The side of the silencer roller 14 is fixedly connected with a plurality of arc-shaped air receiving plates 15 arranged equidistantly in a ring. The arc-shaped air receiving plates 15 are arc-shaped, and the inner side of the curved arc-shaped air receiving plates 15 is fixedly connected with a sound insulation plate 16 for decelerating and reducing the noise of the passing wind flow. The connecting air duct 1 is used as the starting part of the air outlet pipe for connecting the fan to ensure that the wind flow can smoothly enter the air outlet pipe. The slow wind hood 4 further slows down the wind flow speed and reduces the noise generation.

[0026] Furthermore, a shock-absorbing flange gasket 12 is fixedly connected to a side of the air duct 1 away from the air duct expansion section 2 .

[0027] Furthermore, the two ends of the air duct expansion section 2 are funnel-shaped, expanding from the two ends to the middle. The air duct expansion section 2 is designed to be funnel-shaped, expanding from the two ends to the middle. This structure helps to reduce the vortex of the airflow in the pipe, thereby reducing noise.

[0028] Furthermore, a sound insulation material layer is provided on the inner wall of the silencer 3, and the passing wind flow is decelerated and noise is reduced by the built-in sound insulation material layer.

[0029] Furthermore, the end of the bottom surface of the air outlet buffer tube 5 away from the slow wind hood 4 is arc-shaped, and a ventilation hole is opened on the upper surface of the air outlet buffer tube 5. An integrated wind direction guide block 8 is fixedly connected to the end of the top inner wall of the air outlet buffer tube 5 close to the ventilation hole, and a plurality of equidistantly arranged wind guide plates 9 are fixedly connected between the side of the wind direction guide block 8 close to the ventilation hole and the inner wall of the air outlet buffer tube 5. The end of the bottom surface of the air outlet buffer tube 5 away from the slow wind hood is arc-shaped, which helps to smoothly transition the windflow, and adjusts the direction of the windflow by the wind direction guide block 8 and the wind guide plate 9 to ensure that the windflow can pass through the air outlet tube evenly and stably.

[0030] Working principle: When the fan is running, the wind flows into the duct expansion section 2 through the connecting duct 1, and passes through the silencer 3, the slow wind cover 4 and the air outlet buffer pipe 5 in turn, and is discharged through the air outlet duct 6. When the fan enters the connecting duct 1, the shock-absorbing flange gasket 12 can reduce the vibration and noise of the wind flow. When entering the duct expansion section 2 through the connecting duct 1, due to the funnel-shaped design of the duct expansion section 2, the vortex in the wind flow is effectively reduced, thereby preliminarily reducing the noise. When passing through the duct expansion section 2, the wind flow through the duct expansion section 2 will blow on the arc-shaped air receiving plate 15, driving the silencer roller 14 to rotate, so that the arc-shaped air receiving plate 15 and the sound insulation board 16 generate friction with the wind flow, consume part of the energy in the wind flow, and further reduce the noise level. At the same time, the arc-shaped air receiving plate 15 can guide the wind flow, so that the wind flow can pass through the silencer 3 more smoothly. After passing through the silencer 3, the wind flow enters the wind buffer cover 4, further buffering the wind flow speed, and when passing through the wind direction guide block 8 in the air outlet buffer pipe 5, the wind direction guide block 8 and the air guide plate 9 are adjusted to achieve precise control of the wind flow direction, ensuring that the wind flow can pass through the air outlet pipe evenly and stably, thereby improving the noise reduction effect. At the same time, the filter 11 can effectively filter impurities entering the air outlet pipe and protect the internal equipment from damage.

[0031] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An air outlet duct capable of reducing noise based on fan operation, comprising a connecting air duct (1), characterized in that: The connecting air duct (1) is fixedly connected to a side of the connecting air duct (1) with an air duct expansion section (2), the air duct expansion section (2) is fixedly connected to a muffler (3) on a side away from the connecting air duct (1), the muffler (3) is fixedly connected to a wind buffer cover (4) on a side away from the air duct expansion section (2), the wind buffer cover (4) is fixedly connected to an air outlet buffer pipe (5) at one end away from the muffler (3), the upper surface of the air outlet buffer pipe (5) is fixedly connected to an air outlet duct (6), the lower ends of the side surfaces of the connecting air duct (1) and the muffler (3) are fixedly connected to a fixing frame (10), and further comprises: A noise reduction device (7) is arranged in the inner cavity of the air duct expansion section (2) and is used to decelerate and reduce the noise of the passing airflow. The noise reduction device (7) comprises a rotating rod (13), a muffler roller (14) and an arc-shaped air receiving plate (15). The rotating rod (13) is rotatably connected to the upper and lower ends of the inner wall of the air duct expansion section (2). The muffler roller (14) is fixedly connected to the rotating rod (13). A plurality of arc-shaped air receiving plates (15) arranged equidistantly in a ring are fixedly connected to the side of the muffler roller (14). The arc-shaped air receiving plates (15) are arc-shaped, and a sound insulation plate (16) is fixedly connected to the inner side of the curved arc-shaped air receiving plate (15).

2. The air outlet duct capable of reducing noise based on fan operation according to claim 1, characterized in that: A shock-absorbing flange gasket (12) is fixedly connected to the side of the connecting air duct (1) away from the air duct expansion section (2).

3. The air outlet duct capable of reducing noise based on fan operation according to claim 1, characterized in that: The two ends of the air duct expansion section (2) are funnel-shaped and expand from the two ends toward the middle.

4. The air outlet duct capable of reducing noise based on fan operation according to claim 1, characterized in that: A sound insulation material layer is arranged on the inner wall of the silencer cylinder (3).

5. The air outlet duct capable of reducing noise based on fan operation according to claim 1, characterized in that: The bottom surface of the air outlet buffer tube (5) is arc-shaped at one end away from the air buffer cover (4); a ventilation opening is provided on the upper surface of the air outlet buffer tube (5); an integrated wind direction guide block (8) is fixedly connected to one end of the top inner wall of the air outlet buffer tube (5) near the ventilation opening; and a plurality of equidistantly arranged wind guide plates (9) are fixedly connected between the side of the wind direction guide block (8) near the ventilation opening and the inner wall of the air outlet buffer tube (5).

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